How can I tell if my pump has been hot wired?

If it's been hotwired there will be a relay back near the rear bumper / gas tank with wires running up to the top of the tank from the relay .
 
If it's a Red's hot wire it will only have an inline connector where the fuel tank harness plugs into the rear harness.
It will have the relay up by the drivers side relay cluster.
Regardless of the brand, I believe there will be an extra ten gauge wire attached to charging wire lug on the back of the alternator making a total of two wires connected the lug.
 
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